Changeable-speed mechanism.



E. S. ,WATERMAN. CHANGEABLE' smo MECHANISM. I

APPLICATION FILED MAY 12. 1917.

1 ,269,985 V Patented J 11116 18, 1918. v

2 SHEETS-SHEET 1. v

iEL bmvsmon WITNESSES V7 Elienezers J r i ATTOR N EY E. S. WATERMAN.

CHANGEABLE SPEED MECHANISM.

APPLICATlON FILED MAY I2. 1911.

1 ,2693985. 7 Patented June 18, 1918.

2 SHEETS-SHEET 2.

INVENTOR Ebenezer ,5" Wa-Terma'n. VWITNESSES examinees. warranting hr To all 'whom z't may concern: 2

1 Be itknownthat l, E 'ENEZER SaWA-TER- MAN, a citizen of the United-States, residing at Walla \Valla, 'in' thecounty of Walla Walla and State of Washington, haveiinvented certain new and useful Improvements in Changeable-Speed Mechanism, of; which the following is a specification.

This invention relates to-"a changeable speed device, and hasfori its principal object to provide asimple, strong, and'fportable mechanism adapted for varioususe'sbut-designed prima rily to be employed; on a farm for transmitting the power'of'a motor to any and all classes of farm machinery; such f as fanning m1l1s,"'corn shelle'rs, pumps, was'lnng machines, etc., and for changingor adjustingthe power or'speed of theniotor to suit the particular machine-beingdriven. The

mechanis'm'about to be described "comprises few parts, is conveniennportab'le and also readily operable for changing thepower'and speed of the motor, and for'reversing-the direction of rotation, and also for eha'nging the speed of-such' reversed movement. By

the use of this mechanism it possible to transmit the rotary movementof a motor that runs at constant speed to any machine to be driven and quickly adjust thespeed of the motor to suit said machine'without resorting to the shifting iof belts, changing pulleys, or taking other trouble that 'isnsual when a change of speed is fo iiidtobe necessar ll ith the above as the principal objects in view, the'invention consists in the novel construction, combination, and arrangement of parts hereinafter described, pointed out in the appended claim, and illustrated in the accompanying drawings, in which- Figure l is a top plan view of the improved machine for changing and reversing speed from a prime mover, 1

Fig. 2 is front elevation of the same,

Fig. 3 is a detail sectional view on the line 33 of Fig. 1,

Fig. 4 is a detail sectional view on the line 44 of Fig. 2 and Fig. 5 is a like view on the line 5-5 of Fig. 1.

In the drawings, indicates the-frame of the machine comprising a skeleton top plate 11 supported on vertical legsjl2 that extend downwardly to the ground. Secured on the top plate 11 are two bearing'boxes 13 and 14 in substantially the central line of Fas as? tiilts. 3me

WALLLW. v

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maiegl' the machine and designed to. "serve as beararger-o1; *a main horizontal driving elm-e515:

whims-secured a' pulley iadl-i v'ea in the well known m'anner by a' belc frame priihe mover,"not-s'howhh A lso kjeyed on theshaft "15 et its-"forward endand" on the outside" of I 'the fianieHO- is a disk 1'7; the *onm face of whieh is flat'a ndglies'in a' vertieal lane; l

-The- 'beaTr'ing box 14 has aredu ed out- 'w ardextension 18jtlireaded"extriorly at 19 and provided inwardly from its end with a eayity ao inte whicli the rearendfofshaft extends? irhe icavity 20 also' contains an ant if ietion thrust bearing 21 that is nia'inrained-in plaee by at fa ae' having'a reduced poi-times of p oly onalcross-sectio @tc'permit the applicatioiroffa wrehchwhenit is :de siiedf to r niove; onto-s rew" the c'ap upon the extensron' lvs. -To provide "end'wise "adii stmen't; for the shaft 15, whereby 'the disk 171s caus dto' moveto and from the fr'an'ie eternal on theputer an; of gwhich is ahand wlh'eel '25"i1for rotating said stem, "the inner end hf whih is 15in" contact with the thrust -.bear111g 21.- After adjustment has been at- Ttam'e'd, the screw stem 241s locked i'ir'positio'nby a n utij26ff- -':Proje 'cting forwardly from the top plate 1l :o f.-;the' frame 10 are} two horizontal arms 27, '27,:the outer ends ofwhich have men nted of shaft 29 exterior of the bearing 28* is a belt wheel 30"ifor 'convey'ingpower' to any machine to be driven. A collar 31 is fas to slide in a key seat 34 extending the length of the shaft between its bearings. The pulley 32 has a central periphery or rim 35 of rubber or other suitable friction material il lj there threaded 1 in th'e cap "a screw 1 thereon-"bearing bozies 28, 28'fo'r aihoriz'onan shaft :29-lying perpendicular to shaft 15 and pin" the same-"plane; F F-ixjcd en -o1'1e end secured between side disks 36 bolted together operator. A connecting link 39 extends from the lever 37 to the hub 33 of the friction pulley 32 where it divides or forks as at 40 and extends downwardly on each side of a collar 41 rotatable in a groove in the hub 33. Theconnectin-g rod or link 39 pivotally connected to said collar will, when the lever shaft 29, and, if the pulley be carried beyond the center of the disk 1'2, a reverse rotation to be given said pulley. A sliding rod 42 is connected to the bifurcated end of the link 39 and extends outwardly across the top of the adjacent portion of the top plate 11, passing through a bearing 43 thereon in which is threaded a clamping screw at that will engage the rod 42 when turned downwardly and lock said rod, thus holding the pulley 32 in any position of adjustment into which it may be moved.

In using this device the prime mover is belted to the pulley 16 for rotating the shaft 15 and disk 17 at constant speed. The machine to be driven receives power through the belt pulley 30 on the shaft 29, the friction pulley 32 on said shaft being in contact with the disk 17. If high speed is to be transmitted through the pulley 30 the friction pulley 32 is movedv from the center of the disk toward the periphery by rocking the lever 39 untila point has been reached on said disk that imparts the proper speed to the pulley 30. The clamping screw 44 is then turned to lock the rod 42 and thus hold the friction wheel in the desired position. When slower speed is demanded, the friction pulley 32 is moved toward the axis of the disk until the center thereof is reached, whereupon rotation of the pulley will cease. Further, movement of the pulley in the same direction will carry it to the opposite side of the disk axis and rotate the pulley in the opposite direction, thereby obtaining reverse rotation of the pulley 30 when such is desired. Friction between the disk 17 and pulley 32 is governed by the screw stem 24 at the rear end of the shaft 15which turned in one direction forces the shaft 15 forwardly and causes the disk to press with greater force against the pulley 32, and when the screw stem is moved in the opposite direction necessarily this pressure is reduced.

What I claim is:

A changeable speed mechanism including two shafts supported at right angles to each other, a frictional disk on one of said shafts, a frictional pulley on the other shaft engageable with said frictional disk and movable longitudinally on '-its shaft to and from the center of the frictional disk, and means for longitudinally moving said frictional pulley, locking means for holding the pulley in a determined position comprlsinv a rod secured at one end to said means an lying parallel with the pulley shaft, a bearing mounted on a fixed support through which said rod is adapted to slide, and a screw threaded in said bearing and adapted to be clamped against said rod to hold it immovable and the friction pulley in its adjusied position with relation to the friction dis In testimony whereof I afiix my signature in presence of two witnesses.

EBENEZER S. WATERMAN.

Witnesses:

J. G. THOMAS, C. M. GoMs'roox.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patent Washington, D. .0. 

